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Texas Instruments CY74FCT244CTSOC
- Part No.:
- CY74FCT244CTSOC
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT244CTSOC.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:541
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Product details
Overview
CY74FCT244CTSOC from Texas Instruments is an octal 3-state noninverting buffer/line driver designed for memory address, clock, and bus-oriented signal transmission in TTL- and CMOS-compatible systems. It delivers 4.1 ns max propagation delay (tPLH/tPHL), 64 mA sink / 32 mA source output drive, and operates across –40°C to +85°C with 4.75 V–5.25 V supply. Used in industrial control backplanes and legacy data bus interfaces.
For engineers reviewing the CY74FCT244CTSOC datasheet, CY74FCT244CTSOC pinout, CY74FCT244CTSOC application, or CY74FCT244CTSOC equivalent, key selection criteria include 3-state enable timing (tPZH/tPLZ ≤ 5.8 ns), Ioff partial-power-down support, edge-rate controlled noise immunity, and SOIC-20 package compatibility with legacy 5 V logic buses.
Technical Context
This device implements dual independent 4-bit noninverting buffer sections, each controlled by separate 3-state enable inputs (OEA and OEB). Its FCT-family architecture provides TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and CMOS-level output swing (VOH = 2.4 V min at IOH = –32 mA, VOL = 0.55 V max at IOL = 64 mA).
The integrated edge-rate control circuitry limits slew rate to reduce simultaneous switching noise, while the Ioff feature disables outputs and limits leakage to ±1 µA when VCC = 0 V-enabling safe hot-insertion and partial power-down operation in mixed-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | Max 4.1 ns (tPLH/tPHL); enables high-speed 5 V bus interfacing up to ~100 MHz toggle rate. |
| Output Drive | 64 mA sink / 32 mA source per pin; drives heavy capacitive loads (e.g., >100 pF) and multiple TTL inputs without external buffers. |
| Supply Range | 4.75 V–5.25 V; tightly regulated 5 V operation ensures compatibility with legacy TTL and mixed-voltage 5 V systems. |
| Ioff Current | ±1 µA at VCC = 0 V; prevents backflow current during partial power-down, protecting powered-down subsystems. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM; meets industrial handling requirements without additional protection circuitry. |
| Operating Temp | –40°C to +85°C; qualified for extended-temperature industrial and automotive under-hood auxiliary modules. |
Pinout & Package
Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA / OEB | Active-low 3-state enable inputs controlling Group A (pins 2–9) and Group B (pins 18–11) independently. |
| 2–5, 18–15 | DA0–DA3 / DB0–DB3 | Noninverting data inputs for respective buffer groups; TTL/CMOS compatible with 0.8 V/2.0 V thresholds. |
| 3–6, 17–14 | OA0–OA3 / OB0–OB3 | 3-state buffered outputs; high-impedance when corresponding OE is high; full drive strength when enabled. |
| 10 | GND | Digital ground reference; must be low-inductance connection to minimize ground bounce in high-speed switching. |
| 20 | VCC | 5 V power supply; requires local 0.1 µF ceramic decoupling adjacent to pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate control | Controlled output slew reduces simultaneous switching noise (SSN), enabling stable operation on dense PCBs with >50 pF load. |
| Ioff partial-power-down | Outputs disable safely at VCC = 0 V, allowing live insertion into powered backplanes without damaging downstream logic. |
| TTL/CMOS interoperability | Direct interface with 5 V TTL, NMOS, and CMOS without level shifters-input VIH/VIL and output VOH/VOL meet both families' specs. |
| Matched rise/fall times | tPLH ≈ tPHL ensures symmetrical waveform edges, minimizing duty cycle distortion in clock distribution paths. |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or EPROM devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating address signals and enabling bus sharing between multiple memory banks. Use Value: 4.1 ns propagation delay and 64 mA drive ensure clean, fast address transitions across 10+ cm traces with 50–100 pF loading. | Use Scenario: Distributing a system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) on a single board. IC Role / Device Role / Timing Role: Low-skew, fan-out buffer replicating and strengthening the clock signal while maintaining edge integrity. Use Value: Matched rise/fall times and edge-rate control prevent jitter accumulation and maintain <100 ps skew across 8 outputs. |
| Legacy Bus Transceiver Interface | Industrial Backplane Driver |
Use Scenario: Interfacing a modern MCU with legacy ISA or VMEbus peripherals requiring 5 V TTL signaling. IC Role / Device Role / Timing Role: Bidirectional bus driver translating between internal logic levels and external 5 V bus standards using OE-controlled direction. Use Value: Full 5 V drive capability and Ioff support allow hot-swap compatibility with live backplane voltage domains. | Use Scenario: Driving control signals (e.g., enable, reset, interrupt) across a 200 mm industrial backplane with >30 pF trace capacitance. IC Role / Device Role / Timing Role: Robust line driver providing noise-immune signal transmission in electrically noisy factory environments. Use Value: 2000-V HBM ESD rating and edge-rate control ensure reliable operation despite EFT bursts and radiated RFI up to 10 V/m. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT244CTSOCT | Same FCT family, identical 4.1 ns speed grade and SOIC-20 package; TI second-source part with identical electrical specs. | No functional or layout difference; fully interchangeable in existing designs. | Select when sourcing flexibility or dual-sourcing strategy is required. |
| 74ACT244SCX | Higher drive (24 mA source / 24 mA sink), slower (8 ns max), no Ioff or edge-rate control; ACT-family, 5 V only. | Lacks partial-power-down and noise control; unsuitable for hot-swap or high-noise environments. | Use only in cost-sensitive, static 5 V systems where noise and power sequencing are not concerns. |
Compared with SN74FCT244CTSOCT, CY74FCT244CTSOC offers identical performance and drop-in compatibility; versus 74ACT244SCX, it provides superior noise immunity, Ioff safety, and faster timing-justifying use in industrial and bus-critical applications.
Availability
CY74FCT244CTSOC is available at Aetrix Electronics and suitable for industrial control backplanes, legacy bus interfaces, memory address buffering, and clock distribution requiring stable component supply across extended temperature ranges.
Supply support for CY74FCT244CTSOC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The CY74FCT244CTSOC belongs to TI's FCT logic family, engineered for high-speed, low-noise 5 V TTL/CMOS interoperability in mission-critical industrial and legacy computing infrastructure.
FAQ
What is the maximum operating temperature range for CY74FCT244CTSOC?
CY74FCT244CTSOC is rated for continuous operation from –40°C to +85°C ambient temperature, making it suitable for industrial control cabinets, factory automation panels, and outdoor telecom enclosures where thermal cycling occurs. This range is validated per JEDEC JESD78 and confirmed in the official TI datasheet SCCS071.
Does CY74FCT244CTSOC support partial-power-down functionality?
Yes, CY74FCT244CTSOC includes Ioff circuitry that disables all outputs and limits leakage current to ±1 µA when VCC = 0 V. This allows safe insertion into live backplanes and prevents current backflow in mixed-power-domain systems-confirmed in the "Recommended Operating Conditions" and "Electrical Characteristics" tables of the CY74FCT244CTSOC datasheet.
What is the typical output voltage swing for CY74FCT244CTSOC at full load?
At VCC = 5.25 V and IOL = 64 mA, CY74FCT244CTSOC guarantees VOL ≤ 0.55 V; at IOH = –32 mA, VOH ≥ 2.4 V. These values ensure robust noise margins (>0.4 V) when driving standard TTL inputs and are measured under worst-case conditions per the TI SCCS071 test methodology.
Is CY74FCT244CTSOC pin-compatible with other FCT244 variants?
Yes, CY74FCT244CTSOC shares identical SOIC-20 pinout and logic function with CY74FCT244DTSOC (3.6 ns), CY74FCT244ATSOC (4.6 ns), and CY74FCT244TSOC (6.5 ns). All variants use the same pin mapping, enable polarity, and truth table-only propagation delay and drive strength differ per speed grade.
What package type and moisture sensitivity level does CY74FCT244CTSOC use?
CY74FCT244CTSOC uses the SOIC-20 (DW) package with NiPdAu lead finish and is rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH), per TI's Package Option Addendum. The 12.83 mm × 7.5 mm body and 1.27 mm pitch align with IPC-7351 SOIC standards for automated assembly.
CY74FCT244CTSOC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CY74FCT244CTSOC FAQ
1.How can I place an order for CY74FCT244CTSOC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT244CTSOC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY74FCT244CTSOC reliable?
The price and inventory of CY74FCT244CTSOC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT244CTSOC is usually 5 days.
3.What payment methods are accepted for CY74FCT244CTSOC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT244CTSOC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT244CTSOC?
CY74FCT244CTSOC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT244CTSOC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY74FCT244CTSOC?
For technical support, including CY74FCT244CTSOC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT244CTSOC requirements.
6.How does Aetrix verify that CY74FCT244CTSOC is sourced from the original manufacturer or authorized distributors?
All CY74FCT244CTSOC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY74FCT244CTSOC meets industry standards.
7.What is the process for return or replacement of CY74FCT244CTSOC?
All CY74FCT244CTSOC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT244CTSOC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY74FCT244CTSOC part is unused and in its original packaging.
Return procedure for CY74FCT244CTSOC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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